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Start by checking you fuses. You can visibly see the metal strip and if it's broken it's blown. There are two that are fed by gray wires.
If both fuses check okay remove the light switch and check for voltage on the grey wire. If voltage is present then the switch is good, if not the switch is bad.
I'll post the wiring diagram below, I've circled the fuses and light switch wire in green.
Also, below is a link on using a test light to check for voltage.
https://www.youtube.com/watch?v=Hlna_kUt7As
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Tuesday, February 19th, 2019 AT 9:22 AM